US PATENT SUBCLASS 525 / 415
.~.~.~ Solid polymer derived from carboxylic acid cyclic ester, e.g., lactone, etc.

Current as of: June, 1999
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525 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50  DF  .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32}
410  DF  .~.~ Solid polymer derived from hetero-O-cyclic compounds as sole reactants wherein at least one reactant contains a hetero-O-ring other than solely as a 1,2-epoxy or anhydride, and wherein none of the reactants contains a plurality of methylol groups or derivatives thereof {5}
415.~.~.~ Solid polymer derived from carboxylic acid cyclic ester, e.g., lactone, etc.

DEFINITION

Classification: 525/415

Solid polymer derived from carboxylic acid cyclic ester, e.g., lactone, etc.:

(under subclass 410) Subject matter wherein the solid polymer is derived from only hetero-O-cyclic reactants which is derived from a carboxylic acid ester, i.e., -()n-O- (n is one or more and is part of a heterocyclic ring and the carbon atom single-bonded to the oxygen atom of the -()n-O- group is not double bonded to oxygen, sulfur, selenium, tellurium, or triple-bonded to nitrogen).